package cn.gson.crm.filter;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 字符编码和绝对路径设置过滤器
 * @author wangsiyi
 *
 */

public class CommonFilter implements Filter {
	public static final String BASE_PATH_ATTR_KEY = "req_base_path_key";
	public CommonFilter() {
    }

	public void destroy() {
	}

	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		HttpServletRequest req= (HttpServletRequest) request;
		HttpServletResponse rep= (HttpServletResponse) response;
		//字符编码
		req.setCharacterEncoding("utf-8");
		rep.setCharacterEncoding("utf-8");
		//获取绝对路径
		String path = req.getContextPath();
		String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
		req.setAttribute("basePath", basePath);
		req.setAttribute(BASE_PATH_ATTR_KEY, basePath);
		chain.doFilter(request, response);
	}
	public void init(FilterConfig fConfig) throws ServletException {
	}

}
